title: Spatial facilitation predicted with end-stopped spatial filters.
abstract: We examined the role of putative end-stopped spatial filters in determining spatial facilitation associated with a line target flanked by square inducers. Results obtained in normal and amblyopic observers were well predicted by end-stopping and other receptive field features of end-stopped spatial filters revealed in a modified Westheimer paradigm. The role of target-inducer collinearity, the effects of inducer polarity, and facilitation associated with non-orientational circular targets, were also studied. Our results suggest that spatial facilitation results from antagonism surrounding spatial filter centers, with end-stopping playing a prominent role.
authors.affiliation: College of Optometry, University of Houston, TX 77204-6052, USA.
authors.forename: C
authors.initials: C
authors.lastname: Yu
authors.forename: D M
authors.initials: DM
authors.lastname: Levi
mesh_terms: D000328:Adult; D000550:Amblyopia / Q000523:psychology*; D015350:Contrast Sensitivity; D005260:Female; D006801:Humans; D008297:Male; D010775:Photic Stimulation / Q000379:methods; D011601:Psychophysics; D012684:Sensory Thresholds